Microbes that live in the gut don't just digest food. They also have far-reaching effects on the immune system. Now, a new study shows that a particular gut microbe can prevent severe flu infections ...

“Imagine getting a nasal spray in the fall months that protects you from all respiratory viruses, including COVID-19, influenza, respiratory syncytial virus, and the common cold, as well as bacterial ...

As vital as vaccines are, they can be frustratingly selective about their targets. Scientists from institutions across the US have now developed a strikingly "universal" vaccine, which has protected ...